Process of coating objects with subdivided material.



APPLICATION FILED MAR. 27, 1911.

Patented June 20, 1911.

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I. F. BRADLEY. rnocnss or comma OBJECTS WITH 8UBDIVIDED MATERIAL.

. Patented June 20, 1911.

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.20 thereupon whereafter these objects are in- UNITED STATES PATENT orrIoE;

" -rnANKLINn-BRADLEY, or CHICAGO, ILLINoIs, ASSIGNOR TO BRADLEY AND VROO- MAN COMPANY, OF CHICAGO, ILLINoIs, a CORPORATION or ILLINOIS.

- To all whom it may concerns PRoonss oncoarINe owners WITH SUBDIVIDED MATERIAL.

' Be it known that I, FRA KLIN F. BRAD- H'LEY, citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and useful Improvement in'Processes of Goat-- Objects with Subdivided Material, of which the following is a full, clear, concise,

and exact description, reference; being bad to the accompanylng drawings, forming a part of this specificatlon.

My invention relates to a process of coating objects, with subdivided ,mat-erial and more particularly to those processes wherein airor gas in which the subdivided material isyadapted to float. is forced tomovein streams toward the objects to be coated with the subdivided material.

In practicin my invention the objects to becoated ha e adhesive material placed 1' serted in a receptacle which holds a body of "1 gas in "position to enable the objects to be [enveloped by the body of gas. Gas, preferably air, carrying the subdivided material is caused to flow. toward the objects to 'be coated. I deflect the subdivided material laterally ofth'e general direction of-movez are to be coated therewith.

' ment of the stream of gas carrying the sub- 30.

divided material, whereby the subdivided material is more, efl'ectively and speedily brought into contact with the surfaces that My invention is of particular utility in the coating of objects with bronze powder.

A gas which is'appropriate for enabling the bronze particles to float is air, and I will therefore describe my invention as it is used in connection with apparatus in which :40

I floating bronze particles, though I do not bodies of air are employed as means vfor limitmyselfto the use of air for this purf pose.-

The accompanying drawings illustrate two forms of apparatus that may be employed in the practice of my invention and in which drawings Figure 1- is a vertical elevation, partially in section, of one form of apparatus; Fig 2 is a sectional view on line 2 2 of Fig. 1 ;..F1g.

,Speeification of Letters Patent. Patented June 20, 1911. application filed March 27, i911. Serial No. 617,149.

3 is a view of another form of apparatus that may be employed; and F ig. 4 is a sectional view on line 4 40f Fig. 3. Like parts are indicated by similar characters of reference throughout the difierent figures.

Referring first more particularly to Figs. 1 and 2, the receptacle a is shaped suitably to the objects to be received therein, the construction illustrated being well adapted to receive metal bedstead parts that are moved into and out of the receptacle upon a truck 6 through a doorway 0, a bedstead part d bemg illustrated ,within the recepta'clein positionto be enveloped by the air. The doorway constitutes an opening through which the objects to be coated may be passed into the receptacle interior in position to enable the air to be circulated around and toward the objects, and the door 0 constitutes a closure for said opening for preventing escape of material laden air therethrough While the A section e of objects are being coated. suitable piping leads from the air exit side of the receptacle to a power driven fan f, the complemental section 9 of the piping leading from the fan to the air entrance side of the receptacle located opposite the air exit side. The powdered or subdivided material, such as bronze powder, is admitted to the piping preferably through an upright funnel The battle or deflecting plate 70 is of disk formation, in the structure of Figs. 1 and 2, and is mounted near its periphery upon a horizontal rotatable shaft 1, a hand crank m beingemployed to rotate the-shaft. The object to be coated with the subdivided material has a coating of adhesive material first applied thereto and is thereafterinserted within the receptacle so as to be substantially clear of the receptacle walls whereupon the material-laden air is .ca'usedto move toward the object as a consequence of the operation of the fan. The object to be coated is thus enveloped by the body of gas and the moving gas is caused to convey the subdivided material to the object that is to be coated therewith, and in order to improve the result of the operation,

' the subdivided material carried by the flowing gas is deflected laterally of the general be brought into the position illustrated by the dotted lines where it is practically out of service. The disk deflector may be placed in various intermediate positions so that its effect upon the particles of subdivided'material in moving them laterally may be graded, When the baflle or deflecting plate is is in the position illustrated by full lines, spaces intervene between its periphery and thecontiguous wall portions of the receptacle, the material-laden air finding access to the interior of the receptacle through these spaces, some of the air striking the deflecting or baflle plate which deflects the material carried thereby laterally of the general direction in which such material is being carlr'ied by the air moving within the receptac e.

The material-laden air that strikes the deflecting plate or formation and which passes'into the space in front of the baflle plate also impinges upon other receptacle wall portions and upon'the perforated wall portion m, whereby the air is caused to move in a multiplicity of directions and to flow in minor currents and eddies, and the material with which the-air is laden is, as aconsequence, carried to the exposed parts of the object'to be coated that have previously been covered with suitable adhesive material such as wet Varnish. The wall m has a number of perforations nthroughout the same'which cause the air to spread in seeking its outlet from the receptacle thereby further to insure the carriage of the material with which the air is laden to exposed parts of the object to be coated. These perforations cover an aggregate area that is not in excess of a right cross section through the pipe e. The air is caused to have a general movement through the receptacle interior and the place where the air has fullest flow is preferably arbitrarily governed by means of hand valves 0 p,'the upper valve 0 being interposed between the fan f and the sub-compartment 9 through which air is conveyed towardthe fan thatpasses through the upper half of the perforated wall portion m.

The lower valve p i s-interposed between the fan and the sub-compartment r, through which sub-compartment air that finds pas-' sage through the lower half of the perfo- .are given similar characters of reference.

The deflector la in the structure of Figs. 3 and 4 is adapted to be rotated in a plane that is at right angles to the plane of the deflector, instead of in a plane which is coincident with the plane of the deflector in the vcase of the structure in Figs. 1 and 2. In

the structure of Figs. 3 and 4 the axis of rotation of the deflector is included within the plane of the axis of the right hand and incomin length of air conveying/piping and is disposed at right angles to the axis of such incoming length of piping so that the subdivided material conveyed to the deflector by the incoming air may be deflected at various angles laterally of the general direction in which the air is moving within the receptacle as the deflector is turned by the hand crank m. By means of the mechanism shown in Figs. 3 and 4 a very effective and desirable distribution of the subdivided material is occasioned within the receptacle interior so that all parts of the object that are provided with adhesive, material are suitably coated with the subdivided material that is carried to the object by the air in I which the subdivided material is adapted to...

flow.

I have broadly claimed a process of coating objects with subdivided material in my co-pending application Serial No. 614,001, filed March 13, 1911. I have also disclosed apparatus for coatingobjects with subdivided material in my applications Serial No. 543,215, filed February 11, 1910; Serial No. 550,115, filed March 18, 1910; Serial No. 569,428, filed June 29, 1910; Serial No.

588,730, filed October-24, 1910; Serial No. 588,731, filed October 24,1910; Serial No.

603,726,'filed January 20, 1911; Serial No.

609,203, filed February '17, 1911; Serial No. 611,042, filed February 27 1911; and Serial No. 614,879, filed March 16,- 1911.

While I have herein shown and particularly described two types of apparatus that may be used in practicing the method of my invention, I do not wish to be limited to such apparatus for the purpose of practiqing my improved process.

Patent the following: v 4 The process of coating objects with subdivided material which consists in placing adhesive material upon theobject-to be Having thus descrlbed my invention, I1

claim as new and desire to secure by Letters coated; insert" said ohjeet in a [ECG-P1351210] vdirection in which it is Being carried by vvhiehholds a of gas in posit on I enable the object to be envel to the gas. -by: said In witnes's whereof, I hereunto subscribe body of gas; causing the flow 0 :gas toward my name this 10th day of March A. D.,

5 the object to be coated; causing said gas to- 1911 convey subdivided material to the object that 1s; to be coated therewith; and deflect-- ing'th'e gas transversely of its general tion of movement thereby to deflect the Bulb 10 divided material transversely of the general FRANKLIN F. BRADLEY. witnesses:

G. L. Came, Geo. C. DAvIsom 

